weeded



(No Model.)

` W. N. WEEDEN.

I COLLET 0R RBUR FORWATGHES. No..Z45,244 .Patented'Aug 2,1881..

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UNITED STATES PATENT OFFICE.

WILLIAM N. WEEDEN, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE VATERBURY VATCH COMPANY, OF SAME PLACE.

COLLET OR ARBOR FOR WATCHES.

SPECIFICATION 'forming part of Letters Patent No. 245,244, dated August 2, 1881.

(No model.)

To all whom it may concern Be it known that I, WM. N. WEEDEN, of Waterbury, in the county ot' New Haven, and in the State of Connecticut, have invented certain new and usel'ul Improvements in Mainspring Collets or Arbors for Watches; and I do hereby declare that the following is a tull, clear, and exact description thereof, reference being had to the accompanying drawings, making a io .part of this specilication, in which- Figure 1 is a perspective view'ot a mainspring and collet adapted for connection by my improved method, said parts being separated. Fig. 2 is a central crosssection ot the same upon line a x of Fig. l, and Fig. 3 is a longitudinal section otl said collet upon line z z otl Fig. 2.

Letters of like name and kind refer to like parts in each of the figures.

The design of my invention is to enable a watch spring to be securely connected to or with a collet, so as to leave no peripheral projection about which to wind said spring; and to this end it consists in a spring-collet provided With a spring-stud that is formed by cutting an annular recess diagonally into the periphery of said collet, substantially as and for the purpose hereinafter specitied.

In the annexed drawings, A represents a spring-collet havin g the usual cylindrical form, Within one side of which is an annular recess, a, formed by means of a hollow mill, which recess extends diagonally into said collet, and at its center is left a stud, a', that is nearly in aline with the periphery, as seen in Figs. l and 2. As the stud a is formed from the body of the collet A, no portion ot' the -saine projects beyond the periphery of said collet, which retains its cylindrical form and furnishes a round hub upon which to wind a spring.

The mainspring B has near its inner end a round opening, b, that is slightly larger than the stud a', while the end ot' said spring` is cut away upon a line that is concentric with said opening, by which means precisely the same 4 5 width ot' metal is -left at each side and at the end of said spring around said opening. The recess a is slightly largerin diameter than the Width of the spring B, so that the end of the latter may be readily placed within said re- 5o cess around the stud a', in which position said spring-end is securely held, and is incapable ot' becoming` accidentally detached or ot' moving out ot' a central position upon the collet. The stud a is far stronger than any of the usual form, and the spring B has such connection with the collet A as to enable the. full strength of said spring to be utilized.

Having thus fully set forth the nature and merits ot' my invention, what I claim as new 6o A spring-collet provided with a spring-stud that is formed by cutting an annular recess diagonally into the periphery of said collet, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 28th day ot' May, 1881.

WILLIAM N. WEEDEN. Witnesses: i

J. E. JOHNSON, W. F. BALDWIN. 

